Indoor Air Combustion Air Intake - IBC EX Series Installation & Operating Manual

Intake / Fittings
4-inch rigid pipe
6-inch rigid pipe
90° vent elbow
45° elbow
PPs 87-90° elbows
Table 6 Maximum intake pipe venting length for EX 400, 500, 700, and 850
Note
You must use a reducer to connect 6" vent piping to the 4" vent collar. See
For the inlet air – Schedule 40 PVC, CPVC, ABS, PPs or SS piping of any type is permitted.
Note
Unused intake travel cannot be added to the exhaust. Unequal intake and exhaust piping
is allowed.
Ensure that adequate separation is maintained between the air intake inlet and the vent terminal.
Refer to the vent terminal configuration drawings in the Vent Termination section above.
Use support for intake piping, particularly for horizontal runs (follow local codes).

3.5.9 Indoor air combustion air intake

An "Indoor Combustion Air installation" can be described as air for combustion that is taken from the
air surrounding the boiler.
Warning
When using indoor air options, supply adequate combustion air to the boiler room
according to the requirements of all applicable codes.
EX 400, EX 500
170 ft max. each side
n/a
allow 5 ft for each elbow
allow 8 ft for each elbow
allow 3 ft for each elbow
35
3.5.9 Indoor air combustion air intake
EX 700, EX 850
Not allowed
120 ft max. (See note below)
Figure 22 .